Lithium‐Ion Batteries with Superlong Cycle‐Life in Wide Temperature Range via Interfacial Alkyl‐Chain Sway
Abstract
AbstractThe cathode‐electrolyte interphase directly influences the wide‐temperature performance of lithium‐ion batteries, particularly long‐term cycle performance. However, improving both high‐ and low‐temperature properties of cathode often requires distinct approaches, making it challenging to unify these strategies. In this work, an interfacial‐driven strategy on the cathode surface is designed with nano‐Mg(OH)2 with Tween80 (nano‐Mg(OH)2@Tween80). Tween80 serves as the framework of the weak‐linked flexible confined space for preparing ultrafine nano‐Mg(OH)2 and then adsorbs in situ onto the nano‐Mg(OH)2. In the cell assembled with nano‐Mg(OH)2@Tween80 modified LiNi0.5Co0.2Mn0.3O2, the alkyl‐chain sway of Tween80 molecules accelerates electrolyte diffusion on cathode surface. Hence, both the timely formation of a stable and conductive Mg‐rich interphase layer and rapid lithium‐ion transfer are achieved, leading to the co‐improvement of high/low‐temperature performances. The half‐cell with the addition of nano‐Mg(OH)2@Tween80, maintains over 70 mAh·g−1 and 90% Coulombic efficiency after 1000 cycles at 60 °C, and keeps 80 mAh·g−1 with 99% Coulombic efficiency after 500 cycles at −5 °C, even still very stable at −15 °C.
Article Details
Authors (15)
Jinwang Huang
Key Laboratory of Green and High‐end Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China
Lulu Song
State Key Laboratory of Microbial Technology, Institute of Microbial Technology
Bo Zhang
Yuxiang Zhao
Engineering Research Center of Integrated Circuit Packaging and Testing, Ministry of Education, Tianshui Normal University 2 , Tianshui 741000,
Yulong Qian
Key Laboratory of Green and High‐end Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China
Chunyan Wang
Department of Oncology, School of Medicine and Public Health, University of Wisconsin
Xiushen Ye
Fayan Zhu
Key Laboratory of Green and High‐end Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China
Wanzhen Zhang
Key Laboratory of Green and High‐end Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China
Yongqi Shu
Key Laboratory of Green and High‐end Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China
Xueting Li
Hongbo Zhang
Wu Li
Leibniz-Institut für Katalyse
Tiezhu Ma
Salt Lake Chemistry Analysis and Test Center Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai 810008 China
Xinrui Zhang
Gilead Sciences, Foster City, CA